Shedding mechanism for looms.



B.H.RYON. SHEDDING MECHANISM FOR. LOOMS.

APPLICATION FILED JULYZQ, 1912.

Patented Nov. 4, 1913..

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COLUMBIA PLANQGRAPH CO.,\VA5HINGTON, n c.

B. H. RYON. SH'BDDING MECHANISM FOR LOOMS.

APPLICATION FILED JULY 29, 1912.

1,077,757. Patented Nov. 4, 1913.

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coLmuuA PLANOGRAIH cu. WASHINGTON. n. c

E. H. RYON; SHEDDING MECHANISM FOR LOOMSI.

APPLICATION FILED JULYZQ, 1 2. 1,077,757. 91 Patented Nov. 4, 1913.

3 SHEETS-SHEET 3. O

COLUMBIA PILANOGRAPH co WASHINGTON, D. c

UNTTED PATENT OFFICE.

EPPA H. RYON, 0F WALTHAM, MASSACHUSETTS, ASSIGNOR T0 CEOMIETON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS;

SHEDDING MECHANISM FOR LOOMS.

Specification of Letters Patent.

Patented Nov. 4, 1913.

Application filed July 29, 1912. Serial No. 711,960.

To all whom it may concern:

Be it known that I, EPPA H. RYoN, a citizen of the United States, residing at VValtham, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Shedding Mechanism of Looms, of which the following is a specification.

My invention relates to looms, and to shedding mechanism for looms, and more particularly to the pattern indicating and operating mechanism for the harness levers of looms.

The object of my invention is to improve upon the construction of the harness lever operating mechanism, as ordinarily made.

My improved shedding mechanism is arranged in this instance with two hooks, and two indicator levers for each harness lever, and also two indicator surfaces on each pattern chain bar for each harness lever, which is generally known as a double index. The pattern runs on one set of indicator levers are set in advance of the pattern runs on the other set of indicator levers, and the pattern chain moves one bar under one set of runs at one pick, and under the other set of runs at the next pick; this movement of the pattern chain being so timed that a bar remains under each set of runs for two picks of the loom. By means of this double set of indicator levers, with the proper length and position of pattern runs thereon, the hooks for the operation of the harness levers which were indicated for a previous pick, are caused to hold onto the lifter bar, or to remain in engagement with the lifter bar or knife, for practically during the time of two picks, thus preventing the harness levers from running forward when a harness lever is unlocked through theengagement of one of the hooks with a lifter bar.

My invention consists in certain novel features of construction of my improvements as will be hereinafter fully described.

I have only shown in the drawings a detached portion of a harness operating mechanism embodying my improvements, sufficient to enable those skilled in the art to understand the construction and operation thereof.

Referring to the drawings :-Figure 1 is a rear side elevation of a portion of a shedding mechanism, looking in the direction of arrow a, Fig. 2. Fig. 2 is a section, on line 2, 2, Fig. 1, looking in the direction of arrow 6, same figure. Fig. 3 shows a harness lever, detached, and in its lowered position, and a rack movement combined therewith. Fig. 4; is a section, on line 4, a, Fig 2, looking in the direction of arrow .0, same figure, and, F 5 shows, on an enlarged scale, the indicator finger shown at the left in Fig. 4:, detached.

.In the accompanying drawings, 1 is the left. hand loom side or end frame, 2 is the loom arch, at the rear, and 3 is the rear side or frame of the shedding mechanism, which is rigidly connected to, the loom side 1 and the loom arch 2. The rear frame 3, in con nection with the front side of frame 4:, see Fig. 2, is adapted to support the several parts of the shedding mechanism. The upright shaft 5, which is driven by mecha nism on the loom, not shown, is journaled at its upper end in the bearing 6 on the bracket 6, which is secured to the loom side 1. The vertically extending shaft 5 has secured thereon, at its upper end, a beveled pinion 7, which meshes with and drives a bevel gear 8, which has its hub 8 loosely mounted 011 a stud or bolt 9 secured to the frame 3, see Figs. 1 and 2. Rigidly secured to the hub 8 of the bevel gear 8 is a gear 10, which has secured thereto a bevel gear 11, see Fig. 1; said bevel gear 11 is adapted to mesh with and drive a bevel pinion 12, fast on one end of a shaft 13, which is suitably journaled at one end in a bearing 14 on an arm 1d secured to the frame 3; the other end of the shaft 13 is journa-led in the yoke shaped arm or hanger 15. On the outer end of the shaft 13 is secured a worm 16, which meshes with and is adapted to continuously drive a worm gear 17, in the direction indicated by the arrow shown in Fig. 1. The worm gear 17 is secured on one end of the cylinder shaft 18, which carries a pattern cylinder 19, in the usual and well known way.

The pattern chain, which is supported upon the rotary pattern chain cylinder 19, is made up of rolls 20, and tubes 20, which are mounted on bars 20", connected by, links, not shown, in the usual way.

The gear 10, see Fig. 1, meshes with and drives a gear 21, which is secured on one end of a transverse shaft 22, which shaft is suitably journaled in hearings on the frames 3 and 4. The shaft 22 has on its opposite end a gear 21*, see Fig. 2. The two lower gears 21 and 21 are in mesh with and adapted to rotate the upper gears 23 and 23% which are secured upon the transverse shaft 24 carried in bearings on the frames 3 and 4. The lower gears 21 and 21* have preferably adjustably secured thereon the crank plates 25 and 25, which have studs or pins 26 and 26 respectively, on which are pivotally mounted one end of a rod or connector 27 and 27, respectively. The other ends of the rods 27 and 27, are pivotally connected to the studs 28 and 28, respectively, on the moving frame 29. Said frame 29 is adapted to have secured thereto the upper knife or lifter bar 30, and the lower knife or lifter bar 31, see Fig; 2.

Through the rotation of the gears 21 and 21" a simultaneously reciprocating movement is communicated to the knives 30 and 31, in this instance in the same direction in a horizontal plane in slots 3 and 3 in the frame 3, and also in the slots 4 and 4 in the frame 4.

The upper gears 23 and 23 have preferably adjustably secured thereon the crank plates 32 and 32, respectively, which have studs or pins 33 thereon, only one is shown, to which is pivotallyconnected one end of the connectors 34 and 34 respectively. The other ends of the connectors 34 and 34 are pivotally connected to the center knife or lifter bar 35, see Figs. 1 and 4, to which knife a reciprocating movement is communicated in a horizontal plane in the slots 3 and 4 in the frames 3 and 4. The movement communicated to the center knife or lifter bar 35 is preferably in an opposite direction to that of the upper and lower knives or lifter bars 30 and 31.

Two hooks 36 and 37 see Fig. 4, are provided in this instance for the operation of each harness lever; said hooks 36 and 37 have their ends pivotally attached by pins 38 and 39, respectively, to one end 40 of a bar 40, which end or head 40 is preferably of yoke shape, and is connected in a horizontal plane, by two guide plates 41 and 42, see Fig. 4. The opposite end of the bar 40 is provided with the toothed or rack portion 40", which is in mesh with and adapted to rotate a crank pinion 43, which in this instance is pivotally mounted ona boss 44 on a projection 45 on a harness lever 45, which has its hub 45 loosely mounted on the transverse rod 46, see Figs. 3 and 4. The crank pinion 43 is provided with an arm 43, which has pivotally connected to its end one end of a link 47; the other end of said link 47 is pivotally mounted on a transverse rod 48, secured to the frames 3 and 4. The rack bar 40 has its lower end suitably guided on a rib or projection 45' on the harness lever 45, see Figs. 3 and 4.

Through the reciprocating movement of the rack 40", a half turn is lmparted to the pinion 43 in one or the other direction, on every other longitudinal movement of the rack bar 40, and through the action of the link 47, the harness lever 45, on which the pinion 43 is pivoted, will belowered or raised, as shown in Figs. 3 and 4.

The reciprocating knives 30 and 31, which move in unison, are intended to act on projections 36 and 37 on hooks 36 and 37. The center knife 35, which always moves in the opposite direction from the hooks 36 and 37, acts on the projections 36 and 37" on the hooks 36 and 37. The upper hook is raised and lowered by the indicator lever 49, and the intermediate lifter rod 49, and the lower hook 37 is operated by the indicator lever 50, and the intermediate lifter rod 50. A bar 49 extends transversely through the frame 3, between the sets of hooks 36 and 37, see Fig. 4, on the inner side of the lifter rods 49. The bar 49 has extensions 49 on its upper edge and lower edge, which act to hold the hooks 36 and 37 in proper position, and guide them as they are raised and lowered. The indicator levers 49 and 50 are pivotally mounted on a transverse rod 51, and extend over the pattern chain cylinder 19 at their outer weighted ends in the usual way.

The indicating lever 49 is provided with the run 49", see Fig. 5, which in this in stance is set in advance of the run 50 on the second indicating lever 50; said runs 49 and 50 on the indicating levers 49 and 50, cause, by thier proper length and position, the hooks 36 and 37 to be held in engagement with their respective knives for more than half the time of the next pick, or until the time for indicating the following pick. By thus holding both hooks of an operating harness lever in contact with the operating lifter bar, the said harness lever is kept under control of the lifter bar dur ing its entire movement, and cannot run forward, due to the warp strain on the harness.

It will be understood that the lever 45 will be locked with the harness up or down, when the pivotal center 44 is just below a line through the pivotal centers 44 and 48, the position of the harness lever depending on which side of the center 44 the pivot 44 is turned.

When the lever 45 is under strain, due to the tension of the warp, the strain will always have a tendency to turn the pinion 43 as long as the pivotal center 44' is raised above the line through the centers 44 and 48, and will thus cause the operating lifter hook to shoot ahead of the lifter bar, if it were not for the restraining effect of the other hook until the harness reaches a central position.

It will be understood that the details of construction of my improvements may be varied if desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a shedding mechanism of the class described, a pair of reciprocating lifter bars, having a simultaneous movement in the same direction in different planes, a third lifter bar, located to move in a plane intermediate the planes of movement of said pair of litter bars, harness levers, each harness lever having a toothed wheel or pinion pivoted thereon and movable therewith, a connector or link, having one end pivotally connected to said pinion, and the other end pivotally attached to a stationary part of the mechanism, two hooks connected with each harness lever, each of said hooks having a shoulder or projection to cooperate with said third lifter bar, and a shoulder or projection to cooperate with one of said pair of litter bars, a set of pattern indicators to operate one of said hooks, and another set of pattern indicators to operate the other of said hooks.

2. In a shedding mechanism of the class described, a pair of reciprocating lifter bars, having a simultaneous movement in the same direction in different planes, a third lifter bar, located to move in a plane intermediate the planes of movement of said pair of litter bars, harness levers, each harness lever having a toothed wheel or pinion pivoted therer on and movable therewith, a connector or link, having one end pivotally connected to said pinion, and the other end pivotally attached to a stationary part of the mechanism, two hooks connected with each harness lever, each of said hooks having a shoulder or projection to cooperate with said third lifter bar, and a shoulder or projection to cooperate with one of said pair of litter bars, a set of pattern indicators to operate one of said hooks for one pick, and another set of pattern indicators to operate the other of said hooks for the next pick.

3. In a shedding mechanism of the class described, a pair of reciprocating litter bars, having a simultaneous movement in the same direction in different planes, a third lifter bar, located to move in a plane intermediate the planes of movement of said pair of litter bars, harness levers, each harness lever hav ing a toothed wheel or pinion pivoted thereon and movable therewith, a connector or link, having one end pivotally connected to said pinion, and the other end pivotally attached to a stationary part of the mechanism, two hooks connected with each harness lever, each of said hooks having a shoulder or projection to cooperate with said third lifter bar, and a shoulder or projection to cooperate with one of said pair of litter bars, a set of pattern indicators to operate one of said hooks for one pick, and another set of pattern indicators to operate the other of said hooks for the next pick, and means for causing each set of indicators to remain operative for practically two picks.

4. In a shedding mechanism of the class described, a harness lever, a toothed wheel or pinion pivoted thereon, and movable therewith, a connector or link having one end pivotally connected to said pinion, and the other end pivotally attached to a stationary part of the mechanism, a device to cooperate with said pinion to turn the same, and cause the movement of said harness lever, and means to operate said device.

5. In a shedding mechanism ofthe class described, a harness lever, a toothed crank wheel or pinion pivoted on said harness lever, a connector or link having one end pivotally attached to said pinion, and its other end pivotally attached to a stationary part of the mechanism, and means to turn said pinion on its pivotal center to move said harness lever, and lock the same at each end of its movement.

6. In a shedding mechanism of the class described, a harness lever, a toothed crank wheel or pinion pivoted on said harness lever, a connector or link having one end pivotally attached to said pinion, and its other end pivotally attached to a stationary part of the mechanism, and means, including a toothed rack, to turn said pinion on its pivotal center, to move said harness lever, and lock the same at each end of its movement.

EPPA I-I. RYON.

Witnesses:

JOHN C. DEWEY, M. HAAS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. v 

